I dunno why you guys are having issues with playbility. I have a rig with a 2.4 Ghz processor, 512 of ram, and a measly ATI x1600. I get great frames even in harbour with GWX. Loading times from my desktop to in the u-boat are like 12 minutes but once in its all good.
And if it was TGW that you tried, GWX is much improved in the speed department. During beta testing it was noticed that though there was significantly more included in the game, it ran faster than TGW. Still slower than stock but not bad.
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